In addition to that rejection at the rim, Jaylen Brown also blocked a three-point attempt by Ben Simmons (at the 1:16 mark of this video). And here's Brown's alley-oop dunk off an inbounds pass from James Young:

Utah's Summer League feed missed most of Jaylen Brown's inbound-pass dunk in real time, so here's this. pic.twitter.com/HbXj1D1xeM